Thread Hang detector - enable it for Windows only and ifdef'ed out for Mac and Linux.
Thread Hang detector - enable it for Windows only and ifdef'ed
out for Mac and Linux.

BUG=73915
TEST=performance tests
 
Review URL: http://codereview.chromium.org/6576026

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@75935 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser